Rabbi Wein begins the biography of Rabbi Moshe Isserles by painting the backdrop of medieval Poland, then a peaceful place for Jews. Appointed as Rov of Cracow at the young age of 20, the Rema was self-effacing and humble despite the honor bestowed on him. An examination of his personal life, and particularly his relationship with his students, reveals a human and tender side of the posek of Ashkenazic Jewry.